Two-stroke explosion valveless engine



March 4 1924.

J. COSTILLE ET AL TWO-STROKE EXPLOSION VALVELESS ENGINE Filed NOV. '11, 1920 /n ven/'ors Il!!! VIII! /llllll/ Guillaume Robbe per Hhomey Patented- Man 4, 1924.,4

Unire, STATES Jumis c eis'rinnr: AND GUrLnAUME Roxana, or Banssiz'nsg-nnne1um Two-sritoxn ExPLosIon vALvEnnss ENGINE '1 .ip'pncauon and november -11, 1.920. sentirmi. 42ans.

To all" wkom'-zt-mag/ concern.'

Be it known that we, JULES Cos'rlLLE, a

'subject ot the French lRepublic, and resid' ingA in Brussels, Belgium, ,and GUILLAUME.

5 Rosen, a lsubject of the King of- Belgium,

fand residing in Brussels, Belgium, have' inventedc'ertainnew and useful Improvements in'Two-Stroke Explosion Valveless Engines; .and we do herebydeclare the fol- 101 lowing'to be afull, clear,f'and exactdescrip'- f tion ofthe invention, 'such as will enable.-

others skilled in the art to whichit apper-I tains to make and usethe same, reference4 being had to the accompanying drawings, and to letters or igures of reference marked therein, which form a part of this lspecification. L This invention relates to two stroke explosion engines and more e'speclallyto a two str oke .explosion engine without valves of the type 1n. which the carburetted mixture is not sucked directly intothe explosion chamber; it has for its object an improved structure of two stroke explosion engine in which the compression of the Ysaid carburetted mixture takes place in a chamber which is wholly separated from the crank case of the engine.

A further object of this invention consists 80 in particular structural forms o the suction and compression chamber 'for the carburetted mixture, of the piston and of the guiding means of the latter.

'According to this invention the connec- 85 tion rod is slidably mountedin a transverse division wall and is operatively connected to the crank shaft by -a guide slidably mounted in a tubular guideway extending into the crank case.

The reliminary compression ofthe carburetted mixture is effected in the space between the piston and vthe stop or block which obturates the lower end of the cylinder, said space being in communication with the lateral compression chamber. -Thislatv eral chamber is of suiiiciently reduced size for obtaining a high degree compression; this chamber is fastened laterally to the cylinder, and can easily be withdrawn for repairing the motor.

The appended drawings show by way of example a two stroke explosion engine constructed accordingly to the vpresent invention.

same parts in the several figures.

. Referrlngto the drawings the cylindrical VFigs-.1Y and-*.2 are two vertical midway 55.

.sections 'at-right angles of a twostroke explos'ion motor.

Figure 3 Ais a transverse sectional view lthe section being taken through the intake and exhaust'p0rts and through the port effecting communication between the suction and compression chamber and the explosion chamber.

The same reference numbers indicate the' chamber of the engine is indicated at 1 and terminates 1'1 1 a hemis herical chamber 2. A driving plston 3 reciprocates within the chamber 1 and is connected by a Vrod 4 and 70 connecting rod 5 to the crankshaft 6.

The lower end of the cylindrical portion 1 of the engine cylinder is closed by a xed sto'p 7, through which the piston rod .4 passes. The passage of the piston rod' 4 through the stop or block 7 is rendered gastight by means of stuiing material, convenient segments or other convenient means. -The lower part of the piston- 3 conforms to as/nearly as possi-ble the form and size of the highest part of .the stop or block 7; in such a Way as to reduce to a minimum the space between the stop and the piston when the iston is at .the lower end of its stroke.

e cylindrical chamber 1 is -provided with fouropenings:

a the exhaustopening-Q. b theinlet or suction opening 10 for the carburette'd mixture; this opening does not communicate with the explosion chamber of 90 the engine, but` communicates with the plllialrpber 8, when the piston 3 is suiiiciently.l g c the opening 11, through which the carburetted mixture, which has been compressed in the compression chamber-12, enters into the explosion chamber of the cylinder. d the'opening 13 by means. of which the space 8 situated betweenthe piston 3 and the lower end 7 of the cylinder communicates with the lateral compression chamber.12.

The o eration of the engine is as follows: When' t e piston is at the upper end of its stroke, a suction of the carburetted' mixture Afrom' the carburetter through the opening 10 into thespace 8. is effected; the piston on.

met

gases are compressed between the piston 3 and vthe stop -7 further these gases are driven through the opening 13 into the lateral compression chamber 12. When the piston 3 attains the lower end of its stroke, 1t closes the opening 13 and opens by its upper edge the opening 11; the compressed gas enters through this opening 11 `into the exlosion chamber of the en 'ne cylinder. ghe piston on its upwardwstro e compresses further the Ygases before their explosion; this double compression of the carburetted mixture secures a 'convenient degree of carburation and a considerable economy of carburetin material.

his engine as it is above described can be mounted in pairs on the same crank shaft; the essential ieces of the engine ar not altered by this act.

The above description does not mention the usual parts of engine which form no part of the invention.

The stop or block 7 which closes the lower end of the engine cylinder is prolongated by a cylindrical tube which serves as a guide- ,way for the slidings'hoe 15 of the crank head 5.

An opening 14 serves for the lubricating of the arts of the piston rod 4 passing into the sai stop 7.

The crank case is formed by several parts secured to each other, 131, 132, 13, in such a way that the engine is composed of elements which can easily be removed and mounted together, renderin very easy the ins ections and repairs oft e engine.

ther 'structural details of the engine may vary'1 without departing from invention,

Having now particularly described our invention and the manner of its construction and operation, we declare that what we claim as new and desire to be protected in by Letters PatentA is: Y

In an internal combustion engine the combination `with the frame thereof comprisin a crank case containing a crankshaft, a cy inder section and a tubular section mounted in fixed position with its lower end constituting a guidewaydprojecting into the crank case, the upper en terminating in a transverse divislon wall constitutin the bottom of the cylindrical chamber, sai wall having a central opening therein, a piston within saidchamber, a connecting rod havin its upper end connected to said piston an extending through said opening with a sliding fit, a guide slidable within said guideway and operatively connecting the lower end of the rod to the crankshaft, said cylinder section containing a suction and compression chamber in )uxtaposition with the cylindrical-chamber andports adapted to at times effect communieatlon between the said suctionand compression chamber and the space between the iston and said division wall and between t e last-mentioned chamber and the space between the piston and the top of the cylindrical chamber, said cylindrical section also having an exhaust port adapted to communicate with said last mentioned s ace, and an intake port adapted to commumcate with the space between the piston and said division wall for the purpose-set forth. i

In testimony that we claim the foregoing as our invention, we have signed our names in presence of two subscribin" witnesses.

v JULES COS ILLE.

GUTLLAUME ROBBE. Witnesses: l

FELIX DE QOBMAN, JOSEPH ONrnno. 

